Batman: Arkham Asylum puts you behind the cowl of the iconic Dark Knight, fighting his way through Arkham Asylum to stop the Joker from enacting a sinister plot that would have grave consequences for Gotham City.

@strangeling: Actually it is more Eidos's fault. On the official UK version of the Batman game site they had play.com (UK online retailer) listed with the same bonus for pre-ordering. After much anger in the forums someone from the Staff cleared it up, the armoured suit is in every version of the game on every platform. Just certain retailers will be providing a 'bonus code' for players to unlock it early at the start of the game. But everyone will be able to unlock it ingame by playing anyway.

The anger was really because the wording of this pre-order bonus made it sound like Collector's Edition buyers were getting shafted. However since the above mentioned confusion was cleared up play.com has all version (regular + CE) on all platforms of the game listed as providing a 'bonus code to unlock the armoured batsuit'.